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Expired European patentEurope

Method for producing monoethylformamide and dimethylformamide

EP 0233393 B1 · Applicant: E.I. DU PONT DE NEMOURS AND COMPANY

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed February 19, 1986 and granted June 27, 1990. A European patent lasts at most 20 years from filing, so its term ended February 19, 2006.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by August 19, 2011.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledFebruary 19, 1986
PublishedAugust 26, 1987
GrantedJune 27, 1990
Term endedFebruary 19, 2006
Application numberEP 86301163
Classification (CPC)C07C233/00

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedFeb 19, 1986PublishedAug 26, 1987Patent grantedJune 27, 1990Term endedFeb 19, 2006

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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